<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script>
        alert(d);
        var a=10;
        var b="hello";
        c=true;
        function fun(){
            alert("hello");
        }
        var d=35;
    </script>
</head>
<body>
    
</body>
</html>